I drive SS on my tractor ,and wish i had them on the St truck.
if you already own a truck, the change over will probably not be cost effective. as there are some very good fuel efficient duels tires out there.
for a new truck, it's a no brainer imho.
i just bought 2 new ones for the drives, got 329,000 mil. out of the old ones, after regrooving them 50K ago.
i 'think' they improved the ride.
unlike duels, to get the best performance out of a SS set, you need to be somewhat addictive to tire awareness .as mistakes can be very costly. tires balancing, air pressure, rotations, centralizing, inspections, speed management and choosing the right tires are a must.
on a side note, the Yokohama SS drive tire that was introduced in MATS is VERY impressive and might be a game changer.